Table Of Contents
Configuring the 2-Port and 4-Port T3/E3 SPAs
Specifying the Interface Address on a SPA
Verifying the Interface Configuration
Verifying Per-Port Interface Status
Monitoring Per-Port Interface Statistics
Scrambling Configuration Example
Encapsulation Configuration Example
Cable Length Configuration Example
Invert Data Configuration Example
Trace Trail Buffer Configuration Example
Configuring the 2-Port and 4-Port T3/E3 SPAs
This chapter provides information about configuring the 2-Port and 4-Port T3/E3 Shared Port Adapters (SPAs) on the Cisco 12000 Series routers. It includes the following sections:
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Verifying the Interface Configuration
For information about managing your system images and configuration files, refer to the Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.0 and Cisco IOS Configuration Fundamentals Command Reference, Release 12.0 publications.
For more information about the commands used in this chapter, see Chapter 19, "SIP and SPA Command Reference," in this guide, which documents new and modified commands. Also refer to the related Cisco IOS Release 12.0 software command reference and master index publications. For more information about accessing these publications, see the Related Documentation section in the "Preface".
Configuration Tasks
This section describes how to configure the 2-Port or 4-Port T3/E3 SPA for the Cisco12000 series routers and includes information about verifying the configuration.
It includes the following topics:
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Required Configuration Tasks
This section lists the required configuration steps to configure the 2-Port or 4-Port T3/E3 SPA. Some of the required configuration commands implement default values that might be appropriate for your network. If the default value is correct for your network, then you do not need to configure the command.
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Setting the Card Type
The SPA is not functional until the card type is set. Information about the SPA is not indicated in the output of any show commands until the card type has been set. There is no default card type.
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To set the card type for the 2-Port or 4-Port T3/E3 SPA, complete these steps:
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Router# configure terminal
Enters global configuration mode.
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Router(config)# card type {t3 | e3} slot subslot
Sets the serial mode for the SPA:
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Step 3
Router(config)# exit
Exit configuration mode and return to the EXEC command interpreter prompt.
Configure the Interface
To set the ip address for the 2-Port or 4-Port T3/E3 SPA, complete these steps:
Step 1
Router(config)# interface serial slot/subslot/port
Selects the interface to configure and enters interface configuration mode.
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Router(config-if)# ip address address mask
Sets the IP address and subnet mask.
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Router(config-if)# clock source {internal | line}
Sets the clock source to internal.
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Router(config-if)# no shut
Enables the interface.
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Router(config)# exit
Exits configuration mode and returns to the EXEC command interpreter prompt.
Verifying Interface Configuration
Use the show interfaces command to verify the interface configuration:
router# show interfaces serial 0/0/0show interfaces serial 0/0/0Serial0/0/0 is up, line protocol is upHardware is SPA-4T3E3Internet address is 111.1.1.1/24MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, rely 255/255, load 1/255Encapsulation HDLC, crc 32, loopback not setKeepalive not setLast input 00:00:52, output 2d03h, output hang neverLast clearing of "show interface" counters 11:07:23Queueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 dropsAvailable Bandwidth 44210 kilobits/sec30 second input rate 0 bits/sec, 0 packets/sec30 second output rate 0 bits/sec, 0 packets/sec1334 packets input, 510922 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants, 0 throttles0 parity0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort0 packets output, 0 bytes, 0 underruns0 output errors, 0 applique, 0 interface resets0 output buffer failures, 0 output buffers swapped out0 carrier transitionsSpecifying the Interface Address on a SPA
SPA interface ports begin numbering with "0" from left to right. Single-port SPAs use only the port number 0. To configure or monitor SPA interfaces, you need to specify the physical location of the SIP, SPA, and interface in the CLI. The interface address format is slot/subslot/port, where:
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The following example shows how to specify the first interface (0) on a SPA installed in the first subslot of a SIP (0) installed in chassis slot 3:
Router(config)# interface serial 3/0/0This command shows a serial SPA as a representative example, however the same slot/subslot/port format is similarly used for other SPAs (such as ATM and POS) and other non-channelized SPAs.
Optional Configurations
There are several standard, but optional configurations that might be necessary to complete the configuration of your serial SPA.
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Configuring Data Service Unit Mode
Configure the SPA to connect with customer premise Data Service Units (DSUs) by setting the DSU mode. Subrating a T3 or E3 interface reduces the peak access rate by limiting the data transfer rate. To configure the DSU mode and bandwidth, use the following commands:
Router# configure terminal
Enters global configuration mode.
Router(config)# interface serial slot/subslot/port
Selects the interface to configure and enters interface configuration mode.
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T3:
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E3:
Router(config-if)# dsu mode {cisco | digital-link | kentrox | larscom}
Specifies the interoperability mode used by a T3 controller.
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Router(config-if)# dsu bandwidth kbps
Specifies the allowable bandwidth.
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Router(config-if)# remote {accept | fullrate}
Specifies where the DSU bandwidth is set.
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Configuring Maintenance Data Link
MDL messages are used to communicate identification information between local and remote ports. The type of information included in MDL messages includes the equipment identification code (EIC), location identification code (LIC), frame identification code (FIC), unit, Path Facility Identification (PFI), port number, and Generator Identification numbers.
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To configure Maintenance Data Link (MDL), use the following commands.
Router# configure terminal
Enters global configuration mode.
Router(config)# interface serial slot/subslot/port
Selects the interface to configure.
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Router(config-if)# mdl [string {eic | fic | generator | lic | pfi | port | unit} string}] | [transmit {idle-signal | path | test-signal}]
Configures the Maintenance Data Link (MDL) message.
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Configuring Scramble
T3/E3 scrambling is used to assist clock recovery on the receiving end. Scrambling is designed to randomize the pattern of 1s and 0s carried in the physical layer frame. Randomizing the digital bits can prevent continuous, nonvariable bit patterns—in other words, long strings of all 1s or all 0s. Several physical layer protocols rely on transitions between 1s and 0s to maintain clocking.
Scrambling can prevent some bit patterns from being mistakenly interpreted as alarms by switches placed between the Data Service Units (DSUs).
To configure scrambling, use the following commands:
Router# configure terminal
Enters global configuration mode.
Router(config)# interface serial slot/subslot/port
Selects the interface to configure.
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Router(config-if)# [no] scramble
Enables scrambling. Scrambling is disabled by default.
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Configuring Framing
Framing is used to synchronize data transmission on the line. Framing allows the hardware to determine when each packet starts and ends. To configure framing, use the following commands.
Router# configure terminal
Enters global configuration mode.
Router(config)# interface serial slot/subslot/port
Selects the interface to configure.
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Router(config-if)# framing { c-bit | m13}
Sets the framing on the interface.
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Configuring Encapsulation
When traffic crosses a WAN link, the connection needs a Layer 2 protocol to encapsulate traffic. To set the encapsulation method, use the following commands:
Router# configure terminal
Enters global configuration mode.
Router(config)# interface serial slot/subslot/port
Selects the interface to configure.
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Router(config-if)# encapsulation {hdlc | ppp | frame-relay}
Sets the encapsulation method on the interface.
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Verifying Encapsulation
Use the show interfaces command to display the encapsulation method:
router# show interfaces serial 0/0/0show interfaces serial 0/0/0Serial0/0/0 is up, line protocol is upHardware is SPA-4T3E3Internet address is 111.1.1.1/24MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, rely 255/255, load 1/255Encapsulation HDLC, crc 32, loopback not setKeepalive not setLast input 00:00:52, output 2d03h, output hang neverLast clearing of "show interface" counters 11:07:23Queueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 dropsAvailable Bandwidth 44210 kilobits/sec30 second input rate 0 bits/sec, 0 packets/sec30 second output rate 0 bits/sec, 0 packets/sec1334 packets input, 510922 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants, 0 throttles0 parity0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort0 packets output, 0 bytes, 0 underruns0 output errors, 0 applique, 0 interface resets0 output buffer failures, 0 output buffers swapped out0 carrier transitionsConfiguring Cable Length
The cablelength command compensates for the loss in decibels based on the distance from the device to the first repeater in the circuit. A longer distance from the device to the repeater requires that the signal strength on the circuit be boosted to compensate for loss over that distance. To configure cable length, use the following commands:
Router# configure terminal
Enters global configuration mode.
Router(config)# interface serial slot/subslot/port
Selects the interface to configure and enters interface configuration mode.
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Router(config-if)# cablelength length
Sets the cable length.
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Verify Cable Length Setting
Use the show interfaces serial command to verify the cable length setting:
router# show interfaces serial 0/0/0Serial0/0/0 is up, line protocol is upHardware is SPA-4T3E3Internet address is 111.1.1.1/24MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, rely 255/255, load 1/255Encapsulation HDLC, crc 32, loopback not setKeepalive not setLast input 00:00:52, output 2d03h, output hang neverLast clearing of "show interface" counters 11:07:23Queueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 dropsAvailable Bandwidth 44210 kilobits/sec30 second input rate 0 bits/sec, 0 packets/sec30 second output rate 0 bits/sec, 0 packets/sec1334 packets input, 510922 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants, 0 throttles0 parity0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort0 packets output, 0 bytes, 0 underruns0 output errors, 0 applique, 0 interface resets0 output buffer failures, 0 output buffers swapped out0 carrier transitions...Configuring Invert Data
Delays between the TE clock and data transmission indicate that the transmit clock signal might not be appropriate for the interface rate and length of cable being used. Different ends of the wire may have variances that differ slightly. Invert the clock signal to compensate for these factors. To configure invert data, use the following commands:
Router# configure terminal
Enters global configuration mode.
Router(config)# interface serial slot/subslot/port
Selects the interface to configure and enters interface configuration mode.
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Router(config-if)# invert {data}
Inverts the data.
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Verify Invert Data Setting
Use the show running configuration command to verify that invert data was set on the interface:
router# show running configuration...interface Serial6/0/0ip address 51.1.1.1 255.255.255.0logging event link-statusdsu bandwidth 44210framing c-bitcablelength 10clock source internalinvert datamdl string eic tstmdl string lic 67mdl string generator testmdl transmit pathmdl transmit test-signalno cdp enable!...Saving the Configuration
To save your running configuration to nonvolatile random-access memory (NVRAM), use the following command in privileged EXEC configuration mode:
For more information about managing configuration files, refer to the Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.2 and Cisco IOS Configuration Fundamentals Command Reference, Release 12.2 publications.
Verifying the Interface Configuration
Besides using the show running-configuration command to display your Cisco 12000 Series router configuration settings, you can use the show interfaces serial and the show controllers serial commands to get detailed information on a per-port basis for your 2-Port or 4-Port T3/E3 SPA.
Verifying Per-Port Interface Status
To find detailed interface information on a per-port basis for the 2-Port or 4-Port T3/E3 SPA, use the show interfaces serial command. For a description of the command output, see Chapter 19, "SIP and SPA Command Reference."
The following example provides sample output for interface port 1 on the SPA located in the first subslot of the SIP installed in slot 5 of a Cisco 12008 router:
Router# show interface serial 5/0/1Serial5/0/1 is up, line protocol is upHardware is SPA-4T3E3Internet address is 120.1.1.1/24MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec,reliability 255/255, txload 234/255, rxload 234/255Encapsulation HDLC, crc 16, loopback not setKeepalive set (10 sec)Last input 00:00:00, output 00:00:01, output hang neverLast clearing of "show interface" counters neverInput queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0Queueing strategy: fifoOutput queue: 0/40 (size/max)5 minute input rate 40685000 bits/sec, 115627 packets/sec5 minute output rate 40685000 bits/sec, 115624 packets/sec4652915554 packets input, 204728203496 bytes, 0 no bufferReceived 4044 broadcasts (0 IP multicast)130 runts, 0 giants, 0 throttles0 parity1595 input errors, 543 CRC, 0 frame, 0 overrun, 0 ignored, 922 abort4653081242 packets output, 204735493748 bytes, 0 underruns0 output errors, 0 applique, 4 interface resets0 output buffer failures, 0 output buffers swapped out2 carrier transitionsMonitoring Per-Port Interface Statistics
To find detailed status and statistical information on a per-port basis for the 2-Port or 4-Port T3/E3 SPA, use the show controllers serial command. For a description of the command output, see Chapter 19, "SIP and SPA Command Reference."
The following example provides sample output for interface port 1 on the SPA located in the first subslot of the SIP that is installed in slot 5 of the Cisco 12008 router:
show controller serial 5/0/2Serial5/0/2 -Framing is c-bit, Clock Source is LineBandwidth limit is 44210, DSU mode 0, Cable length is 10rx FEBE since last clear counter 0, since reset 0Data in current interval (807 seconds elapsed):0 Line Code Violations, 0 P-bit Coding Violation0 C-bit Coding Violation0 P-bit Err Secs, 0 P-bit Sev Err Secs0 Sev Err Framing Secs, 306 Unavailable Secs500 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err SecsData in Interval 1:0 Line Code Violations, 0 P-bit Coding Violation0 C-bit Coding Violation0 P-bit Err Secs, 0 P-bit Sev Err Secs0 Sev Err Framing Secs, 0 Unavailable Secs564 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err SecsData in Interval 2:0 Line Code Violations, 0 P-bit Coding Violation0 C-bit Coding Violation0 P-bit Err Secs, 0 P-bit Sev Err Secs0 Sev Err Framing Secs, 0 Unavailable Secs564 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err SecsData in Interval 3:0 Line Code Violations, 0 P-bit Coding Violation0 C-bit Coding Violation0 P-bit Err Secs, 0 P-bit Sev Err Secs0 Sev Err Framing Secs, 0 Unavailable Secs562 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err SecsData in Interval 4:0 Line Code Violations, 0 P-bit Coding Violation0 C-bit Coding Violation0 P-bit Err Secs, 0 P-bit Sev Err Secs0 Sev Err Framing Secs, 0 Unavailable Secs560 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs...Total Data (last 44 15 minute intervals):0 Line Code Violations, 0 P-bit Coding Violation,0 C-bit Coding Violation,0 P-bit Err Secs, 0 P-bit Sev Err Secs,0 Sev Err Framing Secs, 0 Unavailable Secs,24750 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err SecsTransmitter is sending AIS.Receiver has loss of signal.40434 Sev Err Line Secs, 0 Far-End Err Secs, 0 Far-End Sev Err Secs0 P-bit Unavailable Secs, 0 CP-bit Unavailable Secs0 CP-bit Far-end Unavailable Secs0 Near-end path failures, 0 Far-end path failuresNo FEAC code is being receivedMDL transmission is disabledConfiguration Examples
This section includes the following configuration examples:
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DSU Configuration Example
The following example confgiures DSU on interface port 0 on slot 4, subslot 1.
! Specify the serial interface and enter interface configuration mode!Router(config)# interface serial 4/1/0!! Specify the DSU mode!Router(config-if)# dsu mode 0!! Specify the DSU bandwidth!Router(config-if)# dsu bandwidth 10000!! Set the DSU bandwidth to accept or reject the incoming remote requests!Router(config-if)# dsu remote acceptMDL Configuration Example
The following example configures the MDL strings on interface port 0 on slot 4, subslot 1.
! Specify the serial interface and enter interface configuration mode!Router(config)# interface serial 4/1/0!! Specify the MDL strings!Router(config-if)# mdl string eic beicRouter(config-if)# mdl string lic beicRouter(config-if)# mdl string fic bfixRouter(config-if)# mdl string unit bunitRouter(config-if)# mdl string pfi bpfiRouter(config-if)# mdl string port bportRouter(config-if)# mdl string generator bgenRouter(config-if)# mdl transmit pathRouter(config-if)# mdl transmit idle-signalRouter(config-if)# mdl transmit test-signalScrambling Configuration Example
The following example configures scrambling on the T3/E3 interface:
! Enter global configuration mode!Router# configure terminal!! Specify the serial interface and enter interface configuration mode!Router(config)# interface serial 4/1/3!! Enable scrambling!Router(config-if)# scramblingFraming Configuration Example
The following example configures framing on interface port 1 on slot 4, subslot 1.
! Specify the serial interface and enter interface configuration mode!Router(config)# interface serial 4/1/1!! Specify the framing method!Router(config-if)# framing m13Encapsulation Configuration Example
The following example configures encapsulation on interface port 1 on slot 4, subslot 1.
! Specify the serial interface and enter interface configuration mode!Router(config)# interface serial 4/1/1!! Specify the encapsulation method!Router(config-if)# encapsulation PPPCable Length Configuration Example
The following example configures sets the cable length to 200 feet:
! Enter global configuration mode!Router# configure terminal!! Specify the serial interface and enter interface configuration mode!Router(config)# interface serial 4/1/3!! Specify the cable length!Router(config-if)# cablelength 200
Invert Data Configuration Example
The following example enables invert data:
! Enter global configuration mode!Router# configure terminal!! Specify the serial interface and enter interface configuration mode!Router(config)# interface serial 4/1/3!! Enable invert data!Router(config-if)# invert data
Trace Trail Buffer Configuration Example
The following example configures the TTB attributes:
! Enter global configuration mode!Router# configure terminal!! Specify the serial interface and enter interface configuration mode!Router(config)# interface serial 4/1/3!! Specify the TTB attributes!Router(config-if)# ttb country ab
Router(config-if)# ttb soperator 56
Router(config-if)# ttb snode 34
Router(config-if)# ttb rnode cd
Router(config-if)# ttb x 7
Router(config-if)# ttb serial 12
